75 free tools and guides for Australian construction — concrete and reo calculators, SWMS and permit checkers, cash flow, crane utilisation, site diary and QR sign generators. No account, no trial, nothing to cancel.">
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Free tools

75 Free Construction Tools & Guides

The complete A-Z directory of every free Obras tool: calculators, checkers, generators and guides, built from the same standard as our document library. Free to use, straight away — no account, no trial, nothing to cancel. Nothing you enter leaves your browser.

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Most useful on site today

If you only open one of these, make it the first.

NEW Site Inspection Ready Pack Six printable pages for the day an inspector walks in — readiness check, documents checklist, visit record, corrective actions, a quick card for the gate, and an evidence checklist. Site Control Score Twenty questions across compliance, production, delivery, leadership and commercial. Returns a score out of 100 and names your biggest control gap. Concrete Pour Readiness Can we pour Level 14 today? Checks across permits, reo, formwork and verification — ready, at risk, or blocked. High-Rise Floor Readiness Structure, services, safety, access, logistics, QA, next trade — is the floor actually ready to hand on? SWMS Compliance Self-Check A diagnostic against what a SWMS is expected to contain. Tells you what is missing; it does not certify anything. ITP Builder Trade, activity, inspection, hold and witness points — build an inspection and test plan you can actually issue.

Every tool

Brick & Block Calculator Bricks, Blocks, Mortar brick and block calculator for Australian sites. Standard bricks or 200-series blocks per wall, mortar bags and core-fill concrete.… Concrete Calculator Order the Right Amount (Free) concrete calculator for Australian sites. Slabs, columns, beams and footings - total m3 with waste allowance and truck count. No… Concrete Pour Readiness Checker work out whether tomorrow’s concrete pour can actually go ahead. Fifteen checks across permits, reo, formwork, verification and… Construction Cash Flow Forecast Peak funding requirement cash flow forecast for Australian builders. Enter the contract, the claim cycle, payment terms and retention, and see week by week… Cost to Complete Calculator Forecast final cost calculator: work out cost to complete, forecast final cost and the margin you will actually finish on. Compares where you are… Crane Lift Planning Checklist Free pre-lift check crane lift planning checklist for Australian construction. Nineteen checks across the load and chart, the rigging, the licensed… Crane Utilisation Calculator Is the crane the bottleneck? crane utilisation calculator for Australian construction. Lifts a day, cycle time and available hours in — utilisation, spare… Cubic Metres to Tonnes Converter Free AU Tool cubic metres to tonnes converter for Australian construction materials - sand, road base, gravel, topsoil, asphalt, concrete,… Cycle Time Calculator Trucks, pours, crane lifts cycle calculator for concrete trucks, excavation cartage and crane lifts. Work out cycle time, how many trucks you actually need,… Daily Pre-Start QR Sign-On — free tool OBRAS ONSITE QR pre-start sign-on for construction sites. Crew scans the site QR, ticks the pre-start declarations, sign-on is recorded and… Defect Close-Out Checker Is this defect actually closed? tool for Australian construction. Fourteen checks on whether a defect is genuinely closed out or just marked closed on a list, with… Defects & Punch List QR — a QR on every unit OBRAS ONSITE defects and punch list tool for construction. A QR per unit or zone, snags logged against the location, trade assigned, closed out… Delay Cost Calculator What a lost day actually costs calculator: work out what a day of delay actually costs on your construction site. Crew, supervision, plant standby, site… Delivery & Crane Slot Board — free tool OBRAS ONSITE delivery and crane slot board for construction sites. Book loading zones and crane time by the hour, get automatic clash flags. No… Digital Trade Handover Gate Obras Onsite digital trade handover gate for construction zones. Outgoing trade declares, supervisor verifies, incoming trade accepts - the… Do I Need a SWMS? Free High Risk Construction Work Checker tick your activities against the 18 high risk construction work categories and find out whether the law requires a SWMS before you… Emergency Information Sign Generator Free Printable fill in your site emergency details and print an A3 emergency information sign - assembly point, wardens, first aiders, nearest… Emergency Plan Checklist Free site emergency check checklist: does your site emergency plan cover what it has to? Fifteen checks on evacuation, wardens, first aid, notification,… EOT Evidence Builder Free extension of time claim tool EOT evidence builder. Most extension of time claims fail on evidence, not entitlement. Build the cause, the dates, the critical path… Evacuation Diagram Builder Free Printable build a site evacuation diagram. Drop exits, assembly point, extinguishers, first aid and YOU ARE HERE onto your site plan, get an… Excavation Calculator Bulk-Out, Truck Loads, Tonnes excavation calculator for Australian sites. Bank volume to loose volume with bulk-out factors, tandem and truck-and-dog loads,… Fall Clearance Calculator Harness & Lanyard Check fall clearance calculator for harness work. Lanyard, absorber extension, worker height and safety margin - the minimum clearance… Fall Protection Decision Tool What Do I Actually Need? height, edge and duration in - the control you are actually required to use out, worked through the hierarchy of control. Plus… First Aid Requirements Calculator How Many First Aiders? crew size, risk and remoteness in - how many first aiders, what kits, and whether you need a first aid room. Based on the model Code… Floor Cycle Planner High-rise deck cycle calculator floor cycle planner for high-rise construction. Enter the activities in your deck cycle and their overlap and find out whether the… Free Site Chat No app, no logins site chat for a construction crew. Make a room, print the QR, everyone scans it at the gate. No app, no accounts, no phone numbers.… Free Toolbox Talk of the Week QR Attendance rotating weekly toolbox talk for Australian construction sites, with QR attendance stored locally on the device. It is not automatically sent to Obras Onsite. A new talk every… Heat & UV Work Planner Free Hot-Weather Tool heat and UV planner for Australian construction sites. Live 7-day forecast with work-rest guidance, hydration prompts and UV… High Risk Work Licence Checker Which licence does this work need? tool for Australian construction. Find which high risk work licence class covers the job, see which common tickets are not licences… High-Rise Floor Readiness Checker tool for tower work: is this floor ready to pour? Checks formwork, backpropping, reo, post-tensioning, services, penetrations,… Hire vs Buy Calculator Plant Hire Break-Even hire vs buy calculator for Australian builders. Weekly hire rate and usage vs purchase price, resale and maintenance - the payback… Incident & Near-Miss QR Reporter Free Tool QR incident and near-miss reporter for construction sites. Scan the site QR, report in 30 seconds, time-stamped and emailed to the… Isolation and Lockout Checklist Free LOTO check isolation and lockout checklist. Fourteen checks covering energy source identification, isolation, locking, tagging, stored energy,… ITP Builder Free Inspection & Test Plan generator ITP builder for Australian construction. Pick the work type - footings, suspended slab, structural steel, waterproofing, facade or… JSA Builder Free Job Safety Analysis & risk assessment tool JSA builder for Australian construction. Break the task into steps, list the hazards, apply controls down the hierarchy, and score… Labour Cost Calculator What an Hour Really Costs labour cost calculator for Australian builders. Wage plus super, workers comp, leave and downtime - the true hourly cost and the… Live Permit Board Permits That Go Red on Expiry live permit board for construction sites. Hot works, confined space, excavation and heights permits with live expiry countdowns -… Markup vs Margin + GST Calculator OBRAS ONSITE markup vs margin calculator for Australian builders and trades, with GST add and remove. 20% markup is not 20% margin - see the… Noise Exposure Calculator LAeq,8h add the noisy tasks in a shift and see the eight-hour noise exposure against the 85 dB(A) standard, plus how long you can safely… Notifiable Incident Wizard Do You Have to Notify? notifiable incident wizard for Australian construction. Four questions to work out if a WHS incident is notifiable, what to… Permit Selector Which permits do I need? tick what is happening on site today and find out which permits to work are commonly required - hot work, confined space, electrical… Plant & Earthworks Calculators Free AU Tools plant calculators for Australian sites: excavator bucket loads by machine size, trench and backfill, batter and benching safety… Plant QR Tags — pre-use checks on a scan OBRAS ONSITE plant and equipment QR tags for construction sites. Scan the machine's QR, run the pre-use check, failures flagged for tag-out. No… Plant Standby Cost Calculator What idle plant is costing you calculator for Australian construction. Work out what plant and operators sitting idle are costing per day and across the delay, and… Pour Day Checklist Free Concrete Pour Tool concrete pour day checklist for Australian sites. Day before, pour morning, during and after - tick it on your phone, gaps go red. Powerline Exclusion Zone Calculator Free Tool how close can plant work to overhead powerlines? Pick the voltage and who is operating, get the exclusion zone, the spotter rule and… Procurement Lead-Time Risk Calculator Latest order date tool for Australian construction. Enter what you need on site and when, plus the lead time, and get the latest date you can order… Programme Recovery Calculator Can you claw the time back? calculator for Australian construction. Enter where the job is against where it should be and find out the productivity lift needed… Progress Claim & Retention Calculator OBRAS ONSITE progress claim and retention calculator for Australian construction. Claim value, retention held and release, GST - the numbers… Rain-Day Money Turn the Site Diary into an EOT Claim guide: how Australian builders and subbies turn daily site diary records into extension of time claims that actually get approved. Reo & Mesh Calculator Sheets, Bar Weights, Chairs reinforcement calculator for Australian sites. Mesh sheets for a slab with laps, rebar weight per metre by bar size, bar chairs. No… Retention Release Reminder Free Builder Tool retention release tracker for Australian subbies and builders. Practical completion and defects liability dates - calendar reminders… RFI Builder Free Request For Information generator RFI builder for Australian construction. Build a Request For Information with the chase trail, the impact and the date needed - the… Scaffold Inspection Tracker 30 Day Reminders log every scaffold on site and see which inspections are due or overdue. Thirty-day cycle, plus the triggers people forget - after… Scan a QR - Obras Onsite Verification Scanner Point your camera at any Obras Onsite document QR and see its controlled record - document identity, revision and current controlled status Service Strike Protocol Hit a Cable or Pipe? emergency protocol for underground service strikes on Australian sites - electrical, gas, water, comms. Silica Dust Control Selector RCS on Site pick the task and the tool and see the silica dust controls expected, what respirator fits, and whether air monitoring and health… Site Control Score Free 20-question assessment 20-question assessment for Australian builders. Score your site out of 100 across compliance, production, delivery, leadership and… Site Diary — your legal memory, kept properly OBRAS ONSITE daily site diary for construction. Weather auto-filled, crew, deliveries, delays, instructions - tap it in on your phone, print a… Site Emergency QR Sign Free Printable Tool site emergency information sign generator. Assembly point, nearest hospital, site contacts on an A4 QR sign - scanning shows the… Site Induction QR Free Sign-In Tool QR site induction sign-on for construction. Visitors and new starters scan the gate QR, acknowledge the site rules, induction… Sling Angle Calculator Load Per Leg Before You Lift sling angle calculator for riggers and doggers. Load and included angle to tension per sling leg, with the standard angle warnings. Subbie Compliance Tracker Insurances, SWMS, VOCs subcontractor compliance tracker for construction. Insurance expiries, SWMS received, inductions - Green/Amber/Red per subbie, with… SWMS Finder Which SWMS Do I Need? search the 300 Australia-wide SWMS activities, tick what is happening on your job, and get the list of SWMS you need - with the document numbers,… SWMS Review Reminders Never Miss a Review Date SWMS review date tracker for construction. Enter your documents and review dates, get a Green/Amber/Red register and calendar… SWMS Self-Check Is your SWMS actually complete? check: does your SWMS contain what a SWMS is required to contain? Sixteen checks on structure, controls, consultation, review and… Tickets & VOC Register Who's Licensed for What crew tickets and VOC register for construction. High-risk work licences, plant tickets and VOCs with expiry Green/Amber/Red and… Timesheet QR On Site, Off Site, On the Record QR timesheet for construction crews. Scan on, scan off - hours logged on the device with a weekly summary and CSV export. No app, no… Trade Measures Buckets, Bags, Sheets & Beads trade measures for Australian sites: buckets and barrows per m3, concrete bags, mix ratios by bucket, paint litres, tiles and… Trench & Excavation Safety Checker Free Tool enter your trench depth and ground conditions and find out whether you need shoring, benching or battering, whether it is high risk… Variation Builder Free construction variation notice variation builder for Australian construction. Record who instructed the change, when, what it affects, and the cost and time impact… Variations & Delay Tracker Free Site Tool variations and delay tracker for Australian builders and subbies. Waste Cost Calculator What Over-Ordering Costs construction waste cost calculator. Over-ordering percentage plus bin lifts and tipping - the real annual cost of waste on your… What’s Blocking My Job? Free decision tool pick the activity - excavation, heights, lifting, confined space, hot work, demolition, precast, roof work, live services or traffic… Zone Stacking Board Flag Trade Stacking Early trade stacking and sequencing board for construction sites. Plan zones for two weeks, get automatic red flags for trade stacking and…
Free tools, a live demo, and a paid library — three different things.
Everything on this page is free and always will be. The interactive demo lets you drive the Control Room with your own company name on it. The document library — SWMS, permits, registers and full systems — is the paid product.

Guides & Free Resources

Useful, free, and not tools — guides, explainers, a free document and crew support. They are deliberately not counted in the Free Tools total.

📚

How It Works — full guide

From buying to using it on site: downloading, branding your documents, what the QR codes do, the daily routine, and every question people actually ask.

Read the guide → 🤝

Look After Your Crew

MATES in Construction, Lifeline and Beyond Blue — the free numbers that matter, plus a printable A4 shed poster with QR.

Crew support → 🎁

Free SWMS

A controlled Obras SWMS sample — editable Word + PDF, Australia-wide. Being updated to the Australia-wide standard; leave your email and it is sent on release. No strings.

Grab it → Free Construction Checklists Obras Onsite Nine free construction checklists - site manager daily walk, prestart, concrete pour readiness, HSE inspection, SWMS review, floor… SWMS vs JSA vs SOP Which One Do You Need? SWMS vs JSA vs SOP explained for Australian construction: what each document is for, when a SWMS is legally required, and when a JSA… What Goes in a SWMS The 8 Required Elements What goes in a SWMS: the 8 elements every compliant Australian Safe Work Method Statement contains, the mistakes that get them…

Need help with your site’s HSE or compliance?

The tools above are free and yours to use. When the paperwork behind them needs a person who has run sites, Obras provides construction HSE support across South East Queensland — the Gold Coast, Logan, Brisbane, Moreton Bay and the Sunshine Coast, and elsewhere by quotation.

On the Gold Coast specifically: construction WHS consultant — Gold Coast.

View HSE ServicesRequest an HSE Review